289515668 has 12 divisors (see below), whose sum is σ = 545625780. Its totient is φ = 133622592.

The previous prime is 289515619. The next prime is 289515679. The reversal of 289515668 is 866515982.

It can be written as a sum of positive squares in 2 ways, for example, as 95804944 + 193710724 = 9788^2 + 13918^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2783753 + ... + 2783856.

It is an arithmetic number, because the mean of its divisors is an integer number (45468815).

Almost surely, 2^289515668 is an apocalyptic number.

It is an amenable number.

289515668 is a deficient number, since it is larger than the sum of its proper divisors (256110112).

289515668 is a wasteful number, since it uses less digits than its factorization.

289515668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567626 (or 5567624 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 50.

The square root of 289515668 is about 17015.1599463537. The cubic root of 289515668 is about 661.5419015630.

The spelling of 289515668 in words is "two hundred eighty-nine million, five hundred fifteen thousand, six hundred sixty-eight".